Improvement in power-presses



B. G. MARTIN.

POWER-PRESS.

No.179,ZO9.- Patented June 2718'76.

M MA/l is@ 'NW/maas N. PETERS. FNQTO-UTHOGRFNER, WASHlNGTON. D C.

UNITED STATES PATENT OEEIcE.

BENJAMIN G. MARTIN, OF NEW YORK, N. Y., ASSIGNOR TO JOHN W.

WHEELOOK, OF SAME PLACE.

IMPROVEMENT I'N POWER-PRESSES.

Specification forming part of Letters Patent No. 179,209, dated June 27,1876; application filed May 13, 137e. f

To all whom it may concern Be it known that I, BENJAMIN G. MARTIN, ofthe city, county, and State of New York, have invented a new and' usefulImprovement in Power-Presses, which invention is fully set forth in thefollowing specication, reference being had to the accompanying drawing,in whichl Figure l represents a front view of my press. Fig. 2 is a planor top view of the same, partly in section.

Similar letters indicate corresponding parts.

This invention consists in the combination, with the follower of apress, and with two segments, which connect with said follower by strapsor pitmen attached to eccentric wristpins secured to said segments, oftwo intermediate pinions, which are in gear with each other and with thesegments, and which are mounted on shafts carrying worm wheels, whichengage one with a right-hand and the nother with a left-hand wormmounted on the driving-shaft, so that by turning this drivingshaft bothsegments are compelled to turn absolutely with the same velocity, andthe folliwer is prevented from assuming an inclined oblique position.With the follower, the

gments, the intermediate gear, the worm- ',vheels, and the right andleft hand worms, are combined a friction-pulley and a weighted 1e- "er,which serve to regulate the friction of the pulley, so that when thematerial in the this head-block rise a series of columns, D,

which support the beams E, and in these beams are formed the bearingsfor two rock-shafts, c a, on which are mounted the segments F F. Inthese segments are secured eccentric wristpins b b, which connect, bypitmen G, with the follower H, four pitmen being used, (one on each sideof the two segments,) so that the follower is effectually prevented fromrocking in either direction. On the head-block O are secured fourjournal-boxes, c c, which form the bearings for shafts d d, on which aremounted pinions f j' and worm-wheels g g. The pinions ff are in gearwith each other, andeach of them is in gear with one of the segments FF. The worm-wheels are in gear one with a lefthanded worm, h, and theother with a righthanded worm, h', both said worms being mounted on thedriving-shaft I. On this shaft is placed a pulley, J, which revolvesloosely on the same, and the rim of which forms a socket to engage witha friction-clutch, K. This friction-clutch is subjected to the action ofa lever, L, from which is suspended a weight, M, so that by the actionof said weight the clutch is pressed into the socket of the pulley J.

It is obvious that a friction-clutch of any suitable construction may beused in connection with therpulley J.

The device which I have represented in Figs. 2 and 3 of the drawing isof peculiar construction, however, and I do not wish to give adescription thereof in this present specifcation, since the same formsthe subject-matter of a separate application for a patent.

By moving the weightM on the lever L the amount of friction between theclutch and the pulley can be regulated.

The pulley J receives its motion by means of a belt, or by africtiongear, and if the clutch is in gear with said pulley the shaft Ireceives a revolving motion, and the follower is raised toward thehead-block. By raising the lever L the friction-clutch is thrown out ofgear with the pulley J, and while this pulley coutinues to rotateindependent of the shaft I the follower sinks down by its own Weight,and by the weight of the material which rests on it.

By the action of the intermediate pinions f f both segments F F arealways turned with precisely the same speed, and the follower iseffectually prevented from assuming an inclined position. At the sametime the pinions increase the power of the press.

The weight M is so adjusted on the lever L that the shaft I continues torotate until the material on the follower has been compressed to thedesired extent; then the pulley J slides 0n the friction-clutch, and alldanger of breaking any portion of the mechanism is avoided.

The worm-wheels g g may also be secured on their shafts by means offriction-clutches o, as indicated in Fig. 2; but, in practice, I havefound that such is not absolutely necessary, since the friction-pulley Jproduces the effect desired.

What I claim as new, and desire to secure by Letters Patent, is

1. The combination, with the follower of a press, and with segments Fand pitmen Gr, attached to the eccentric wrist-pills secured to saidsegments, of intermediate pinions ff, shafts d d, worm-(wheels g g,right and left hand worms h h', and driving-shaft I, all conhavehereunto set my hand and seal this 9th day of May, 1876.

B. G. MARTIN. [L. s]

Witnesses:

W. HAUFF, E. F. KASTENHUBER.

